201123232129 has 2 divisors, whose sum is σ = 201123232130. Its totient is φ = 201123232128.

The previous prime is 201123232097. The next prime is 201123232157. The reversal of 201123232129 is 921232321102.

It is an a-pointer prime, because the next prime (201123232157) can be obtained adding 201123232129 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179057615104 + 22065617025 = 423152^2 + 148545^2 .

It is a cyclic number.

It is not a de Polignac number, because 201123232129 - 2⁵ = 201123232097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201123232097 and 201123232106.

It is not a weakly prime, because it can be changed into another prime (201123236129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561616064 + 100561616065.

It is an arithmetic number, because the mean of its divisors is an integer number (100561616065).

Almost surely, 2^201123232129 is an apocalyptic number.

It is an amenable number.

201123232129 is a deficient number, since it is larger than the sum of its proper divisors (1).

201123232129 is an equidigital number, since it uses as much as digits as its factorization.

201123232129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 201123232129 in words is "two hundred one billion, one hundred twenty-three million, two hundred thirty-two thousand, one hundred twenty-nine".